LG UU85W User manual

Brand: LG

Model: UU85W

Type: User manual

This manual is also suitable for

UU85W.U74

P/NO : MFL68645303

Rev.00_042318

INSTALLATION MANUAL

AIR

CONDITIONER

Please read this installation manual completely before installing the product.

Installation work must be performed in accordance with the national wiring

standards by authorized personnel only.

Please retain this installation manual for future reference after reading it thoroughly.

Standard inverter

Original instruction

www.lg.com

ENGLISH ESPAÑOL

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 1

• Do not cool excessively indoors. This may be harmful for your health and may consume more

electricity.

• Block sunlight with blinds or curtains while you are operating the air conditioner.

• Keep doors or windows closed tightly while you are operating the air conditioner.

• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.

• Speed up the fan to cool or warm indoor air quickly, in a short period of time.

• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air

conditioner is used for many hours.

• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the

air flow or weaken the cooling / dehumidifying functions.

For your records

Staple your receipt to this page in case you need it to prove the date of purchase or for warranty

purposes. Write the model number and the serial number here:

Model number :

Serial number :

You can find them on a label on the side of each unit.

Dealer’s name :

Date of purchase :

Here are some tips that will help you minimize the power consumption when you use the air

conditioner. You can use your air conditioner more efficiently by referring to the instructions

below:

TIPS FOR SAVING ENERGY

ENGLISH

TIPS FOR SAVING ENERGY

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 2

IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.

Always comply with the following precautions to avoid dangerous situations and ensure peak

performance of your product.

WARNING

It can result in serious injury or death when the directions are ignored.

CAUTION

It can result in minor injury or product damage when the directions are ignored.

WARNING

• Installation or repairs made by unqualified persons can result in hazards to you and others.

• The information contained in the manual is intended for use by a qualified service technician

familiar with safety procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment

malfunction, property damage, personal injury and/or death.

Installation

• Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.

- There is risk of fire or electric shock.

• For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service

Center.

- Do not disassemble or repair the product. There is risk of fire or electric shock.

• Always ground the product.

- There is risk of fire or electric shock.

• Install the panel and the cover of control box securely.

- There is risk of fire or electric shock.

• Always install a dedicated circuit and breaker.

- Improper wiring or installation may cause fire or electric shock.

• Use the correctly rated breaker or fuse.

- There is risk of fire or electric shock.

• Do not modify or extend the power cable.

- There is risk of fire or electric shock.

• Do not let the air conditioner run for a long time when the humidity is very high and a door or

a window is left open.

- Moisture may condense and wet or damage furniture.

• Be cautious when unpacking and installing the product.

- Sharp edges could cause injury. Be especially careful of the case edges and the fins on the

condenser and evaporator.

• For installation, always contact the dealer or an Authorized Service Center.

- There is risk of fire, electric shock, explosion, or injury.

• Do not install the product on a defective installation stand.

- It may cause injury, accident, or damage to the product.

• Be sure the installation area does not deteriorate with age.

ENGLISH

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 3

- If the base collapses, the air conditioner could fall with it, causing property damage, product

failure, and personal injury.

• Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not

compress air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or

explosion.

- There is the risk of death, injury, fire or explosion.

Operation

• Do not store or use flammable gas or combustibles near the product.

- There is risk of fire or failure of product.

CAUTION

Installation

• Always check for gas (refrigerant) leakage after installation or repair of product.

- Low refrigerant levels may cause failure of product.

• Install and insulate the drain hose to ensure that water is drained away properly based on the

installation manual.

- A bad connection may cause water leakage.

• Keep level even when installing the product.

- To avoid vibration or water leakage.

• Do not install the product where the noise or hot air from the outdoor unit could damage the

neighborhoods.

- It may cause a problem for your neighbors.

• Use two or more people to lift and transport the product.

- Avoid personal injury.

• Do not install the product where it will be exposed to sea wind (salt spray) directly.

- It may cause corrosion on the product. Corrosion, particularly on the condenser and

evaporator fins, could cause product malfunction or inefficient operation.

• If it is installed at a place with a lot of snowfall, install with the frame and base height higher

than the most extreme snowfall amount standard, and mount the snowfall hood (separately

sold).

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 4

TABLE OF CONTENTS

ENGLISH

2 TIPS FOR SAVING ENERGY

3 IMPORTANT SAFETY INSTRUCTIONS

6 INSTALLATION OF OUTDOOR UNIT

10 LIFTING METHOD

11 INSTALLATION

11 The location of the Anchor bolts

12 Foundation for Installation

13 CONNECTING PIPES

13 Preparation of Piping

Plumbing materials and storage methods

16 REFRIGERANT PIPING INSTALLATION

16 Precautions on Pipe connection / Valve operation

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

17 Preparation Work

18 Pipe Drawing Out

21 Thermal insulation of refrigerant pipe

22 WIRING CONNECTION

22 Electrical Wiring

22 Connecting Cables between Indoor Unit and Outdoor Unit

25 Connecting the cable to Outdoor Unit

27 Forming the piping

28 LEAKAGE TEST AND EVACUATION

28 Preparation

28 Leakage test

29 Evacuation

30 TEST RUNNING

32 SELF-DIAGNOSIS FUNCTION

32 Error Indicator (Outdoor)

33 Dip S/W Setting

35 INSTALLATION GUIDE AT THE SEASIDE

TABLE OF CONTENTS

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 5

INSTALLATION OF OUTDOOR UNIT

ENGLISH

- If an awning is built over the unit to prevent

direct sunlight or rain exposure, make sure

that heat radiation from the condenser is not

restricted.

- Ensure that the spaces indicated by arrows

around front, back and side of the unit.

- Do not place animals and plants in the path

of the warm air.

- Take the air conditioner weight into account

and select a place where noise and vibration

are minimum.

- Select a place so that the warm air and noise

from the air conditioner do not disturb

neighbors.

You need to select adequate installation location considering the following conditions, and make

sure to acquire the consent of the user.

- Place that can sufficiently endure the weight and vibration of the outdoor unit and where even

installation is possible.

- Place that has no direct influence of snow or rain

- Place with no danger of snowfall or icicle drop

- Place without weak floor or base such as decrepit part of the building or with a lot of snow

accumulation

- Install at a place with fluent water draining to prevent damage from localized heavy rain and

avoid frequent flooded area.

• Single Operation

If installed tube is shorter than 15 m,

additional charging is not necessary.

Additional Refrigerant

= (A-15) x Additional refrigerant (g)

INSTALLATION OF OUTDOOR UNIT

More than

300 mm

Fence or

obstacles

More than 700 mm

More than 600 mm

More than

300 mm

More than

300 mm

Sunroof

Unit : mm

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Capacity

(kBtu/h)

Pipe Size mm(inch) Length A(m) Elevation B(m)

Additional

refrigerant

(g/m)

Gas Liquid Standard Max. Standard Max.

85 Ø 22.2(7/8) Ø 12.7(1/2) 15 75 5 30 70

Installation Places

Piping length and the elevation

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 6

INSTALLATION OF OUTDOOR UNIT

ENGLISH

• Synchro Operation

Install the branch pipe so that pipe length and difference between high and low will not exceed

below Spec.

• Refrigerant Additional Charging Method

For additional charging method, see below table.

- When installing the branch pipe, direction and angle of installation is not limited.

- Take care so that burrs and foreign material may not enter into the cutting surface when

connecting.

- Connect remaining those by cutting or direct insertion to the diameter of pipe.

[Unit : m]

Branch

Remote

Controller

Pipe Length & Height Spec(MAX.)

Total(L1+L2+L3+L4+L5)

Main Pipe(L1)

Branch Pipe (L2+L3+L4+L5)

Each

Indoor-Outdoor (H1)

Indoor-Indoor (H2)

(L1+L2),(L1+L3),(L1+L4),(L1+L5)

Indoor Unit Refrigerant Additional charging (g)

Duo Refrigerant = (L1-b) x B + (L2 + L3) x C

Trio Refrigerant = (L1-b) x B + (L2 + L3 + L4) x C

Quartet Refrigerant = (L1-b) x B + (L2 + L3 + L4 + L5) x C

Capacity (kBtu/h) b (mm) B(g/m)

85 15 70

Pipe Diameter.

(mm)

C (g/m)

Ø 6.35 35

Ø 9.52 40

NOTE

b : Rated performance for refrigerant line length.

C : Additional charging Refrigerant of Branch Liquid Pipe.

B : Additional charging Refrigerant of Main Liquid Pipe.

CAUTION

• Capacity is based on standard length and maximum allowance length is on the basis of

reliability.

• Improper refrigerant charge may result in abnormal cycle.

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 7

INSTALLATION OF OUTDOOR UNIT

ENGLISH

Possible combination of indoor units

Synchro

Duo Trio Quartet

IDU : INDOOR UNIT

ODU : OUTDOOR UNIT

BD : BRANACH

DISTRIBUTOR UNIT

REMO : WIRED REMOTE

CONTROLLER

ODU

IDU IDU

REMO

ODU

IDU IDU IDU

REMO

IDU IDU IDU IDU

ODU

REMO

Capacity (kBtu/h) Cassette Duct

Convertible

Cassette Duct

Convertible

Cassette Duct

Convertible

UT42 NM2*2 UM42 N24*2 UV42 NL2*2 CT24 NP2*3

CM24 N14*3

CB24L N32*3

CV24 NJ2*3 CT18 NQ2*4

CM18 N14*4

CB18L N22*4

CV18 NJ2*4

Applied

Accessi

ries

BD unit PMUB11A PMUB111A PMUB1111A

Simple central

controller**

PQCSZ250S0

NOTE

** When using synchro operation,

• Do not use wireless remote controller.

• Use only one wired remote controller in the indoor units.

• Use central controller and function controller "PQCSZ250S0" only.

Synchro Combination table

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 8

INSTALLATION OF OUTDOOR UNIT

ENGLISH

1 DIP_SW Setting

Set the DIP_SW as below Table (Ⓐ)

2 Auto Addressing Method

Addressing work assigns address to each indoor unit. When firstly installing product or replacing

the indoor unit PCB. Auto Addressing work should be done for simultaneous operation.

* Work procedure

1) Set DIP_SW correctly.

2) Turn on main power.

3) Press the SW01M for about 3 seconds within 3 minutes After main power on.(Ⓑ)

4) After step 3), the LED01E(red LED) and LED02E(green LED) rapidly flickers. When Addressing

work is done, green LED is off, else LED (LED01E) stops flickering and lights continuously.

Address of indoor unit is indicated on the wired remote control display window. (CH01, CH02,

CH03, CH04)

5) Press

]

button to turn on the indoor.

6) If you fail to perform the Addressing work, repeat step 2)~5).

Outdoor Unit PCB Setting Procedure For Simultaneous Operation System

Main PCB

SW01M

DIP SW01D

LED01E

LED02E

12345678910

DIP SW01D Indoor Unit No.

12345678910

1(Single)

: Default

12345678910

2(Duo)

12345678910

3(Trio)

12345678910

4(Quartet)

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 9

LIFTING METHOD

ENGLISH

CAUTION

Be very careful while carrying the product.

• Do not have only one person carry product if it is more than 20 kg.

• PP bands are used to pack some products. Do not use them as a mean for transportation

because they are dangerous.

• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in

your hands.

• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise

plastic packaging bag may suffocate children to death.

• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting

with 3-point support may make Outdoor Unit unstable, resulting in a fall.

• Use 2 belts of at least 8 m long.

• Place extra cloth or boards in the locations where the casing comes in contact with the

sling to prevent damage.

• Hoist the unit making sure it is being lifted at its center of gravity.

- When carrying the suspended, unit pass the ropes between legs of base panel under the unit.

- Always lift the unit with ropes attached at four points so that impact is not applied to the unit.

- Attach the ropes to the unit at an angle of 40° or less.

- Use only accessories and parts which are of the designated specification when installing.

Air outlet grille Intake hole

Corner

Handle

Always hold the unit by the corners, as holding

it by the side intake holes on the casing may

cause them to deform.

Sub line

40° or less

WARNING

LIFTING METHOD

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 10

INSTALLATION

ENGLISH

The location of the Anchor bolts

- Install at places where it can endure the weight and vibration/noise of the outdoor unit.

- The outdoor unit supports at the bottom shall have width of at least 100 mm under the Unit’s

legs before being fixed.

- The outdoor unit supports should have minimum height of 200 mm.

- Anchor bolts must be inserted at least 75 mm.

At least 100 mm

Center of the Unit

For outdoor units should not

be supported only by the

corner supports.

Center of the Unit

1 090

700

380

401

INSTALLATION

[Unit : mm]

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 11

INSTALLATION

ENGLISH

Foundation for Installation

- Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake

or gust.

- Use the H-beam support as a base support

- Noise and vibration may occur from the floor or wall since vibration is transferred through the

installation part depending on installation status. Thus, use anti-vibration materials (cushion pad)

fully (The base pad shall be more than 200 mm).

At least 200 mm

Unit : mm

200

100

Ⓐ The corner part must be fixed firmly. Otherwise,

the support for the installation may be bent.

Ⓑ Get and use M10 Anchor bolt.

Ⓒ

Put Cushion Pad between the outdoor unit and ground

support for the vibration protection in wide area.

Ⓓ Space for pipes and wiring (Pipes and wirings for

bottom side)

Ⓔ H-beam support

Ⓕ Concrete support

CAUTION

• Be sure to remove the Pallet(Wood Support) of the

bottom side of the outdoor unit Base Pan before

fixing the bolt. It may cause the unstable state of the

outdoor settlement, and may cause freezing of the

heat exchanger resulting in abnormal operations.

• Be sure to remove the Pallet(Wood Support) of the

bottom side of the outdoor unit before welding. Not

removing Pallet(Wood Support) causes hazard of fire

during welding.

WARNING

• Install where it can sufficiently support the weight of the outdoor unit.

If the support strength is not enough, the outdoor unit may drop and hurt people.

• Install where the outdoor unit may not fall in strong wind or earthquake.

If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.

• Please take extra cautions on the supporting strength of the ground, water outlet

treatment(treatment of the water flowing out of the outdoor unit in operation), and the

passages of the pipe and wiring, when making the ground support.

• Do not use tube or pipe for water outlet in the Base pan. Use drainage instead for water

outlet. The tube or pipe may freeze and the water may not be drained.

•

If it is installed at a place with a lot of snowfall, install with the frame and base height higher than

the most extreme snowfall amount standard, and mount the snowfall hood (separately sold).

Pallet(Wood Support)

- Remove before Installation

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 12

CONNECTING PIPES

ENGLISH

Preparation of Piping

CONNECTING PIPES

Copper

tube

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Flare nut

Copper tube

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper ﬂaring =

Main cause of gas leakage is defect in flaring

work. Carry out correct flaring work in the

following procedure.

1 Cut the pipes

- Use the accessory piping kit or the pipes

purchased locally.

- Measure the distance between the

indoor and the outdoor unit.

- Cut the pipes a little longer than

measured distance.

- Cut the cable 1.5 m(4.9 ft) longer than

the pipe length.

2 Burrs removal

- Completely remove all burrs from the cut

cross section of pipe/tube.

- Put the end of the copper tube/pipe to

downward direction as you remove burrs

in order to avoid to let burrs drop in the

tubing.

3 Putting nut on

- Remove flare nuts attached to indoor and

outdoor units, than put them on

pipe/tube having completed burr removal.

(Not possible to put them on after flaring

work)

4 Flaring work

- Carry out flaring work using flaring tool as

shown below.

5 Check

- Compare the flared work with figure.

- If flare is noted to be defective, cut off

the flared section and do flaring work

again.

Firmly hold copper tube in a bar(or die) as

indicated dimension in the table above.

Pipe diameter

Inch (mm)

A inch (mm)

Wing nut type Clutch type

Ø 1/4 (Ø 6.35)

0.04~0.07

(1.1~1.8)

0~0.02

(0~0.5)

Ø 3/8 (Ø 9.52)

Ø 1/2 (Ø 12.7)

Ø 5/8 (Ø 15.88)

Bar

Copper pipe

"A"

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 13

CONNECTING PIPES

ENGLISH

Plumbing materials and storage methods

Pipe must be able to obtain the specified thickness and should be used with low impurities.

Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound.

Should not be mixed with contaminations such as dust, moisture.

Refrigerant piping on three principles

Drying Cleanliness Airtight

Should be no moisture inside No dust inside.

There is no refrigerant

leakage

Items

Moisture

Dust

Leakage

Cause

failure

- Significant hydrolysis of

refrigerant oil

- Degradation of refrigerant

oil

- Poor insulation of the

compressor

- Do not cold and warm

- Clogging of EEV, Capillary

- Degradation of refrigerant

oil

- Poor insulation of the

compressor

- Do not cold and warm

- Clogging of EEV, Capillary

- Gas shortages

- Degradation of refrigerant

oil

- Poor insulation of the

compressor

- Do not cold and warm

Counter

measure

- No moisture in the pipe

- Until the connection is

completed, the plumbing

pipe entrance should be

strictly controlled.

- Stop plumbing at rainy day.

- Pipe entrance should be

taken side or bottom.

- When removal burr after

cutting pipe, pipe entrance

should be taken down.

- Pipe entrance should be

fitted cap when pass

through the walls.

- No dust in the pipe.

- Until the connection is

completed, the plumbing

pipe entrance should be

strictly controlled.

- Pipe entrance should be

taken side or bottom.

- When removal burr after

cutting pipe, pipe entrance

should be taken down.

- Pipe entrance should be

fitted cap when pass

through the walls.

- Airtightness test should

be.

- Brazing operations to

comply with standards.

- Flare to comply with

standards.

- Flange connections to

comply with standards.

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 14

CONNECTING PIPES

ENGLISH

Nitrogen substitution method

Welding, as when heating without nitrogen substitution a large amount of the oxide film is

formed on the internal piping.

The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of

oil pump in compressor.

It prevents normal operation of the compressor.

In order to avoid this problem, Welding should be done after replacing air by nitrogen gas.

When welding plumbing pipe, the work is required.

1 Always use the nitrogen.(not use oxygen, carbon dioxide, and a Chevron gas):

Please use the following nitrogen pressure 0.02 MPa

Oxygen – Promotes oxidative degradation of refrigerant oil.

Because it is flammable, it is strictly prohibited to use

Carbon dioxide – Degrade the drying characteristics of gas

Chevron Gas – Toxic gas occurs when exposed to direct flame.

2 Always use a pressure reducing valve.

3 Please do not use commercially available antioxidant.

The residual material seems to be the oxide scale is observed.

In fact, due to the organic acids generated by oxidation of the alcohol contained in the

anti-oxidants, ants nest corrosion occurs. (causes of organic acid → alcohol + copper +

water + temperature)

CAUTION

Regulator

Nitrogen gas

Pressure 0.02 MPa less

Auxiliary valve

Taping

(Should not

contain air)

Welding Point

Note) should not block the outlet side.

When the internal pressure in pipe is abo

ve the atmospheric pressure, pinhole is o

ccurred and it is a leakage cause.

Oxide scale

Nitrogen

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 15

REFRIGERANT PIPING INSTALLATION

ENGLISH

Precautions on Pipe connection / Valve operation

Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the

refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor

unit. Flare connection for the indoor unit, and welding connection for the outdoor pipe and the

branching parts.

- Use hexagonal wrench to open/close the valve.

Liquid pipe

Gas pipe

CAUTION

Please block the pipe knock outs of the front and side panels after installing the pipes.

(Animals or foreign objects may be brought in to damage wires.)

WARNING

• Always careful not to leak the refrigerant during welding.

• The refrigerant generates poisonous gas harmful to human body if combusted.

• Do not perform welding in a closed space.

• Be sure to close the cap of the service port to prevent gas leakage after the work.

REFRIGERANT PIPING INSTALLATION

※Pictures may differ depending on the model.

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 16

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

- Pipe connections can be done on the front side or on the side according to the installation

- Be sure to let 0.2 kgf/cm

Nitrogen flow in the pipe when welding.

- If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe

and disturb the normal operations of valves and condensers.

Front Pipe

Draw Out

Right Side Pipe

Draw Out

Bottom Side Pipe

Draw Out

Rear Side Pipe

Draw Out

Refrigerant Pipe

Regulator

Nitrogen

Taping

Valve

Nitrogen

Direction

Nitrogen

Direction

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.

Removal Area for Liquid/Gas pipe

bottom side connections.

Wet towel

CAUTION

• Do not give damage to the pipe/base during the Knock Out work.

• Proceed to pipe work after removing burr after Knock Out work.

•

Perform sleeve work to prevent damage to the wire when connecting wires using knock Outs.

• Take care so that there is no thermal damage on the service valves of the outdoor unit.

(Especially packing part of service port.) Wrap the service valve with a wet towel when

brazing it as shown figure above.

PIPE CONNECTIONS BETWEEN INDOOR AND

OUTDOOR UNIT

※Pictures may differ depending on the model.

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 17

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe

work.

• Proceed the leakage prevention cap removal as follows:

- Verify whether the liquid/gas pipes are locked.

- Extract remaining refrigerant or air inside using the service port.

- Remove the leakage prevention cap

Service Port

Leakage Prevention Cap

Liquid pipe

Gas pipe

Pipe Drawing Out

Method of drawing out pipes on the front side and right side

- Proceed with the pipe work as shown in the below figure for front side and right side pipe

drawing out.

Pipe Knock Out for

Liquid/Gas pipes

※Pictures may differ depending on the model.

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 18

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Method of drawing out pipes on the bottom side

- Drawing out common pipe through base panel

Method of drawing out pipes on the rear side

- Proceed with the pipe work as shown in the below figure for rear side pie drawing out.

Liquid pipe Gas pipe

Remove only liquid/gas pipe Knock out

Pipe Knock Out for Liquid/Gas pipes

※Pictures may differ depending on the model.

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 19

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Welding

- Pipe connections can be done on the front side or on the side according to the installation

environments.

- Be sure to let 0.2 kgf/cm

Nitrogen flow in the pipe when welding.

- If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe

and disturb the normal operations of valves and condensers.

1,MFL68645303(영) 2018. 4. 25. 영영 10:54 Page 20

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Brand: LG

Model: UU85W

Type: User manual

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